Circuit breaker heaters and translational magnetic systems

A thermal-magnetic trip unit for a circuit breaker, the thermal-magnetic trip unit comprising:

• a heater comprising;
• a first portion having a first surface disposed in a first plane;
• a second portion having a second surface disposed in a second plane that is substantially parallel to the first plane, wherein the first surface is separated by a first predetermined distance from the second surface;
• a third portion disposed between the first portion and the second portion, the third portion comprising a third surface disposed in a third plane that is substantially perpendicular to the first plane, wherein the third surface has a first predetermined length and is separated by a second predetermined distance from the second surface;
• and
• a translational magnetic system coupled to the heater
• wherein the translational magnetic system comprises an armature and armature locator disposed above a yoke, and
• wherein the translational magnetic system further comprises an armature guide pin, wherein the armature and the armature locator are adapted to slide on the armature guide pin.

A circuit breaker comprising:

• a heater comprising;
• a first portion having a first surface disposed in a first plane;
• a second portion having a second surface disposed in a second plane that is substantially parallel to the first plane, wherein the first surface is separated by a first predetermined distance from the second surface;
• and
• a third portion disposed between the first portion and the second portion, the third portion comprising a third surface disposed in a third plane that is substantially perpendicular to the first plane, wherein the third surface has a first predetermined length and is separated by a second predetermined distance from the second surface wherein the first predetermined distance is measured parallel to the third plane and the first plane and second planes are different planes, and the second predetermined distance is measured parallel to the first plane;
• and
• a translational magnetic system coupled to the heater.